Developer

cocos2d for iPhone is a framework for building 2D games, demos, and other graphical/interactive applications. It is based on the cocos2d design: it uses the same concepts, but instead of using python it uses objective-c.cocos2d for iPhone is:

Easy to use: it uses a familiar API, and comes with lots of examples

Fast: it uses the OpenGL ES best practices and optimized data structures

Flexible: it is easy to extend, easy to integrate with 3rd party libraries

Free: is open source, compatible both with closed and open source games

Community supported: cocos2d has an active, big and friendly community (forum, IRC)

AppStore approved:More than 2500 AppStore games already use it, including many best seller games.